List questions from manifolds

Published on 03 Apr 2018 - 5:03

384

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Homeomorphism between $[0,\infty)^n$ with Upper Half-Space $\mathbb{H}^n$

Published on 25 Mar 2026 - 7:40

166

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$M \# M \cong M$ in the noncompact case

Published on 22 Mar 2026 - 9:08

287

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Topological manifold in $\mathbb R^n$, of dimension at least 2, minus a countable set

Published on 25 Mar 2026 - 7:52

333

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Formalize idea of 'homeomorphism that preserves geodesics'?

Published on 25 Mar 2026 - 23:26

846

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Is the surface of a cube a 2-dimensional differentiable manifold?

Published on 05 Apr 2018 - 9:18

2.6k

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proof that finite dimensional vector spaces are manifold

Published on 05 Apr 2018 - 12:57

390

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For $n \ge 3$, is $\mathbb R^n \setminus A$ simply connected for any countable set $A$?

Published on 25 Mar 2026 - 9:53

100

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Simple connected ness of $\mathbb R^n$ minus a compact line segment , for $n \ge 3$

Published on 25 Mar 2026 - 9:49

1.2k

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Confusion over notion of compact manifold with or without boundary

Published on 25 Mar 2026 - 17:40

389

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Diffeomorphism between a submanifold of $\mathbb{R}^4$ and $\mathbb{S}^2$

Published on 25 Mar 2026 - 17:37

180

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Exercise on atlas and class of differentiable function on a smooth manifold

Published on 06 Apr 2018 - 16:59

110

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About $f(z)dz$(closed differential form)

Published on 07 Apr 2018 - 8:12

31

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for which values of $q$ is $S_q = \{x = (x_1,\dots,x_n) \in \mathbb{R^n}\;|\; \sum_{i} |x_i|^q = 1 \}$ a submanifold of $\mathbb{R^n}$?

Published on 07 Apr 2018 - 10:17

238

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Inequality about dimensions of submanifolds

Published on 24 Mar 2026 - 23:45

List Question

De Rham Cohomology of the open ball on $\mathbb{R}^n$

Homeomorphism between $[0,\infty)^n$ with Upper Half-Space $\mathbb{H}^n$

$M \# M \cong M$ in the noncompact case

Topological manifold in $\mathbb R^n$, of dimension at least 2, minus a countable set

Formalize idea of 'homeomorphism that preserves geodesics'?

Is the surface of a cube a 2-dimensional differentiable manifold?

proof that finite dimensional vector spaces are manifold

For $n \ge 3$, is $\mathbb R^n \setminus A$ simply connected for any countable set $A$?

Simple connected ness of $\mathbb R^n$ minus a compact line segment , for $n \ge 3$

Confusion over notion of compact manifold with or without boundary

Diffeomorphism between a submanifold of $\mathbb{R}^4$ and $\mathbb{S}^2$

Exercise on atlas and class of differentiable function on a smooth manifold

About $f(z)dz$(closed differential form)

for which values of $q$ is $S_q = \{x = (x_1,\dots,x_n) \in \mathbb{R^n}\;|\; \sum_{i} |x_i|^q = 1 \}$ a submanifold of $\mathbb{R^n}$?

Inequality about dimensions of submanifolds

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